Polychaete fauna associated with holdfasts of the large brown alga Himantothallus grandifolius in Admiralty Bay, King George Island, Antarctic |
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Authors: | Krzysztof Pabis Jacek Sicinski |
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Institution: | (1) Laboratory of Polar Biology and Oceanobiology, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland |
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Abstract: | The polychaete community associated with holdfasts of the brown alga Himantothallus grandifolius in Admiralty Bay has been studied. It is the first study of its kind in this area and only the second in the Antarctic. Samples
were collected in the summer season of 1979/1980 from a depth range of 10–75 m. Seventy-eight species were found on 19 holdfasts.
The community was dominated by Brania rhopalophora and Neanthes kerguelensis. Analysis of similarity showed that polychaete fauna associated with this habitat did not show any partitioning related to
depth. Regression analysis showed that densities of both species and individuals decreased with increased holdfast volume.
A positive correlation was found between the number of individuals and holdfast volume. Polychaetes from 10 feeding guilds
were found with dominance of macrophagous motile herbivores and sessile filter feeders. The complex habitat provided by holdfasts
is a shelter for a rich polychaete fauna and may function as important protection from disturbance in the shallow areas of
Admiralty Bay. |
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